Square piping cap



FIG. 1 is a front perspective view of the square piping cap;

FIG. 2 is a front face view of the square piping cap;

FIG. 3 is a back face view of the square piping cap;

FIG. 4 is a left face view of the square piping cap;

FIG. 5 is a right face view of the square piping cap;

FIG. 6 is a top face view of the square piping cap; and,

FIG. 7 is a bottom face view of the square piping cap. 

CLAIM The ornamental design for a square piping cap, as shown and described. 